refactor(editor): delete editingHole + activeHandleDrag legacy flags

Migrate the two pure-mirror interaction flags off `useEditor` onto the
authoritative `useInteractionScope`. Both carried payloads byte-identical to
the scope union, so this is a zero-behaviour-change refactor: readers use the
reference-stable `useEditingHole()` / `useActiveHandleDrag()` hooks (or the
`getEditingHole()` imperative read), and producers drive the scope directly
with guarded `endIf` so clearing one interaction never stomps an unrelated
scope. Adds the `holeEditScope` builder + a no-leaked-flag invariant test.

Closes the first slice of the legacy-flag deletion; the rich-payload flags
(movingNode, curving*, *Endpoint, placementDragMode) remain.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/editor/src/components/editor/custom-camera-controls.tsx

@@ -22,6 +22,7 @@ import {
 } from 'three'
 import { EDITOR_LAYER } from '../../lib/constants'
 import useEditor from '../../store/use-editor'
+import { useActiveHandleDrag } from '../../store/use-interaction-scope'
 
 const currentTarget = new Vector3()
 const tempBox = new Box3()
@@ -614,7 +615,7 @@ export const CustomCameraControls = () => {
   const movingNode = useEditor((s) => s.movingNode)
   const movingWallEndpoint = useEditor((s) => s.movingWallEndpoint)
   const movingFenceEndpoint = useEditor((s) => s.movingFenceEndpoint)
-  const activeHandleDrag = useEditor((s) => s.activeHandleDrag)
+  const activeHandleDrag = useActiveHandleDrag()
   const isBoxSelectActive = mode === 'select' && selectionTool === 'marquee'
   const isInteracting = Boolean(
     tool ||

packages/editor/src/components/editor/floating-action-menu.tsx

@@ -36,11 +36,12 @@ import { useFrame } from '@react-three/fiber'
 import { useCallback, useMemo, useRef } from 'react'
 import * as THREE from 'three'
 import { resolveOverlayPolicy } from '../../lib/interaction/overlay-policy'
+import { holeEditScope } from '../../lib/interaction/scope'
 import { duplicateRoofSubtree } from '../../lib/roof-duplication'
 import { emitDeleteSFX, sfxEmitter } from '../../lib/sfx-bus'
 import { duplicateStairSubtree } from '../../lib/stair-duplication'
 import useEditor from '../../store/use-editor'
-import useInteractionScope from '../../store/use-interaction-scope'
+import useInteractionScope, { useActiveHandleDrag } from '../../store/use-interaction-scope'
 import { formatMeasurement, MeasurementPill } from './measurement-pill'
 import { NodeActionMenu } from './node-action-menu'
 
@@ -217,12 +218,11 @@ export function FloatingActionMenu() {
   const setCurvingWall = useEditor((s) => s.setCurvingWall)
   const setCurvingFence = useEditor((s) => s.setCurvingFence)
   const setSelection = useViewer((s) => s.setSelection)
-  const setEditingHole = useEditor((s) => s.setEditingHole)
   const unit = useViewer((s) => s.unit)
   // Drives the height-drag dimension pill below the menu. `activeHandleDrag`
   // flips only at drag start / end, so subscribing here is cheap — the live
   // height value is written imperatively in the useFrame below.
-  const activeHandleDrag = useEditor((s) => s.activeHandleDrag)
+  const activeHandleDrag = useActiveHandleDrag()
   // R/T rotation axis for kinds with full 3D orientation (duct fittings).
   const rotationAxis = useEditor((s) => s.rotationAxis)
   // The floating action menu is an action-conflicting control: hard-hidden
@@ -634,11 +634,13 @@ export function FloatingActionMenu() {
         holes: [...currentHoles, newHole],
         holeMetadata: [...currentMetadata, { source: 'manual' }],
       })
-      setEditingHole({ nodeId: selectedId, holeIndex: currentHoles.length })
+      useInteractionScope
+        .getState()
+        .begin(holeEditScope({ nodeId: selectedId, holeIndex: currentHoles.length }))
       // Re-assert selection so the node stays selected
       setSelection({ selectedIds: [selectedId] })
     },
-    [node, selectedId, updateNode, setEditingHole, setSelection],
+    [node, selectedId, updateNode, setSelection],
   )
 
   const handleDelete = useCallback(

packages/editor/src/components/editor/floorplan-panel.tsx

@@ -94,6 +94,7 @@ import useEditor, {
   isMagneticSnapActive,
   selectSiteFloorplanContext,
 } from '../../store/use-editor'
+import useInteractionScope, { useActiveHandleDrag } from '../../store/use-interaction-scope'
 import usePlacementPreview from '../../store/use-placement-preview'
 import { FloorplanAlignmentGuideLayer } from '../editor-2d/floorplan-alignment-guide-layer'
 import { FloorplanCursorIndicatorOverlay as Editor2dFloorplanCursorIndicatorOverlay } from '../editor-2d/floorplan-cursor-indicator-overlay'
@@ -4551,7 +4552,7 @@ export function FloorplanPanel({
   const curvingFence = useEditor((state) => state.curvingFence)
   const phase = useEditor((state) => state.phase)
   const mode = useEditor((state) => state.mode)
-  const activeHandleDrag = useEditor((state) => state.activeHandleDrag)
+  const activeHandleDrag = useActiveHandleDrag()
   const setPhase = useEditor((state) => state.setPhase)
   const setMovingFenceEndpoint = useEditor((state) => state.setMovingFenceEndpoint)
   const setMovingNode = useEditor((state) => state.setMovingNode)
@@ -4561,8 +4562,6 @@ export function FloorplanPanel({
   const setStructureLayer = useEditor((state) => state.setStructureLayer)
   const setTool = useEditor((state) => state.setTool)
   const tool = useEditor((state) => state.tool)
-  const editingHole = useEditor((state) => state.editingHole)
-  const setEditingHole = useEditor((state) => state.setEditingHole)
   const deleteNode = useScene((state) => state.deleteNode)
   const updateNode = useScene((state) => state.updateNode)
   const {
@@ -7215,12 +7214,14 @@ export function FloorplanPanel({
     const draft = siteBoundaryDraftRef.current
     if (draft) {
       clearSiteBoundaryLivePreview(draft.siteId)
-      const editor = useEditor.getState()
+      const scope = useInteractionScope.getState().scope
+      const activeHandleDrag =
+        scope.kind === 'handle-drag' ? { nodeId: scope.nodeId, label: scope.handle } : null
       if (
-        editor.activeHandleDrag?.nodeId === draft.siteId &&
+        activeHandleDrag?.nodeId === draft.siteId &&
-        editor.activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
+        activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
       ) {
-        editor.setActiveHandleDrag(null)
+        useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
       }
     }
 
@@ -9718,7 +9719,9 @@ export function FloorplanPanel({
       siteBoundaryDraftRef.current = nextDraft
       setSiteBoundaryDraft(nextDraft)
       setSiteBoundaryLivePreview(siteId, nextDraft.polygon)
-      useEditor.getState().setActiveHandleDrag({ nodeId: siteId, label: SITE_BOUNDARY_DRAG_LABEL })
+      useInteractionScope
+        .getState()
+        .begin({ kind: 'handle-drag', nodeId: siteId, handle: SITE_BOUNDARY_DRAG_LABEL })
       setSiteVertexDragState({
         pointerId: event.pointerId,
         siteId,
@@ -9800,7 +9803,9 @@ export function FloorplanPanel({
       siteBoundaryDraftRef.current = nextDraft
       setSiteBoundaryDraft(nextDraft)
       setSiteBoundaryLivePreview(siteId, nextPolygon)
-      useEditor.getState().setActiveHandleDrag({ nodeId: siteId, label: SITE_BOUNDARY_DRAG_LABEL })
+      useInteractionScope
+        .getState()
+        .begin({ kind: 'handle-drag', nodeId: siteId, handle: SITE_BOUNDARY_DRAG_LABEL })
       setSiteVertexDragState({
         pointerId: event.pointerId,
         siteId,

packages/editor/src/components/editor/node-arrow-handles.tsx

@@ -48,6 +48,7 @@ import { createEditorApi } from '../../lib/editor-api'
 import { sfxEmitter } from '../../lib/sfx-bus'
 import useDirectManipulationFeedback from '../../store/use-direct-manipulation-feedback'
 import useEditor from '../../store/use-editor'
+import useInteractionScope from '../../store/use-interaction-scope'
 import useOpeningGuides from '../../store/use-opening-guides'
 import { suppressBoxSelectForPointer } from '../tools/select/box-select-state'
 import { formatAngleRadians } from '../tools/shared/segment-angle'
@@ -681,12 +682,14 @@ function LinearArrow({
         overrideId,
         onBegin: () => {
           if (measureLabel) {
-            useEditor.getState().setActiveHandleDrag({ nodeId, label: measureLabel })
+            useInteractionScope
+              .getState()
+              .begin({ kind: 'handle-drag', nodeId, handle: measureLabel })
           }
         },
         onEnd: () => {
           if (measureLabel) {
-            useEditor.getState().setActiveHandleDrag(null)
+            useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
           }
           if (onDrag) useOpeningGuides.getState().clear()
         },
@@ -1149,15 +1152,17 @@ function ArcArrow({
       // handles route a measurement label here; rotate gets a sentinel label so
       // the HUD shows the rotate hint, not a dimension pill.
       if (isRotateShape) {
-        useEditor
+        useInteractionScope
           .getState()
-          .setActiveHandleDrag({ nodeId: node.id, label: ROTATE_HANDLE_DRAG_LABEL })
+          .begin({ kind: 'handle-drag', nodeId: node.id, handle: ROTATE_HANDLE_DRAG_LABEL })
       }
 
       return {
         onEnd: () => {
           setRotationDelta(null)
-          if (isRotateShape) useEditor.getState().setActiveHandleDrag(null)
+          if (isRotateShape) {
+            useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
+          }
         },
         move: ({ event: moveEvent, intersectPlane: intersectMovePlane }) => {
           const hit = new Vector3()

packages/editor/src/components/editor/selection-manager.tsx

@@ -70,6 +70,7 @@ import {
 import { emitDeleteSFX, sfxEmitter } from '../../lib/sfx-bus'
 import useDirectManipulationFeedback from '../../store/use-direct-manipulation-feedback'
 import useEditor, { type MaterialTargetRole } from './../../store/use-editor'
+import useInteractionScope, { getEditingHole } from '../../store/use-interaction-scope'
 import { boxSelectHandled, suppressBoxSelectForPointer } from '../tools/select/box-select-state'
 import { swallowNextClick } from './node-arrow-handles'
 
@@ -1557,8 +1558,10 @@ export const SelectionManager = () => {
         // Clicking any node (e.g. the slab surface outside a hole) exits slab
         // hole-edit mode. The hole handles + hit mesh stopPropagation, so a
         // click reaching here means the user clicked outside the hole.
-        if (useEditor.getState().editingHole) {
+        if (getEditingHole()) {
-          useEditor.getState().setEditingHole(null)
+          useInteractionScope
+            .getState()
+            .endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
         }
 
         activeStrategy.handleSelect(

packages/editor/src/components/editor/site-edge-labels.tsx

@@ -9,7 +9,7 @@ import { useCallback, useMemo, useRef, useState } from 'react'
 import { type Camera, type Object3D, Vector3 } from 'three'
 import { formatLinearMeasurement } from '../../lib/measurements'
 import { SITE_BOUNDARY_DRAG_LABEL } from '../../lib/site-boundary'
-import useEditor from '../../store/use-editor'
+import { useActiveHandleDrag } from '../../store/use-interaction-scope'
 
 type ViewportSize = {
   width: number
@@ -37,7 +37,7 @@ export function SiteEdgeLabels() {
     const node = state.nodes[firstRoot]
     return node?.type === 'site' ? (node as SiteNode) : null
   })
-  const activeHandleDrag = useEditor((state) => state.activeHandleDrag)
+  const activeHandleDrag = useActiveHandleDrag()
   const unit = useViewer((state) => state.unit)
   const cameraMode = useViewer((state) => state.cameraMode)
   const isNight = useViewer((state) => getSceneTheme(state.sceneTheme).appearance === 'dark')

packages/editor/src/components/editor/slab-hole-highlights.tsx

@@ -25,7 +25,9 @@ import {
 } from 'three'
 import { LineBasicNodeMaterial, MeshBasicNodeMaterial } from 'three/webgpu'
 import { EDITOR_LAYER } from '../../lib/constants'
+import { holeEditScope } from '../../lib/interaction/scope'
 import useEditor from '../../store/use-editor'
+import useInteractionScope, { useEditingHole } from '../../store/use-interaction-scope'
 import { suppressBoxSelectForPointer } from '../tools/select/box-select-state'
 import { swallowNextClick } from './handles/use-handle-drag'
 
@@ -254,7 +256,7 @@ function SelectedSlabHoleHighlights({ slabId }: { slabId: string }) {
   const node = useScene((state) => state.nodes[slabId as AnyNodeId])
   const override = useLiveNodeOverrides((state) => state.overrides.get(slabId))
   const hoveredHole = useEditor((state) => state.hoveredHole)
-  const editingHole = useEditor((state) => state.editingHole)
+  const editingHole = useEditingHole()
   const setHoveredHole = useEditor((state) => state.setHoveredHole)
 
   const slab = node?.type === 'slab' ? (node as SlabNode) : null
@@ -389,21 +391,25 @@ function SlabHoleHighlight({
       // user edits the source rather than the synced hole. Everything else —
       // manual holes and holes that predate holeMetadata — opens the editor.
       if (metadata?.source === 'stair' && metadata.stairId) {
-        useEditor.getState().setEditingHole(null)
+        useInteractionScope
+          .getState()
+          .endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
         useEditor.getState().setHoveredHole(null)
         resetPointerCursor()
         selectOwnedNode(metadata.stairId, 'stair')
         return
       }
       if (metadata?.source === 'elevator' && metadata.elevatorId) {
-        useEditor.getState().setEditingHole(null)
+        useInteractionScope
+          .getState()
+          .endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
         useEditor.getState().setHoveredHole(null)
         resetPointerCursor()
         selectOwnedNode(metadata.elevatorId, 'elevator')
         return
       }
 
-      useEditor.getState().setEditingHole({ nodeId: slabId, holeIndex })
+      useInteractionScope.getState().begin(holeEditScope({ nodeId: slabId, holeIndex }))
       useViewer.getState().setSelection({ selectedIds: [slabId as AnyNodeId] })
     },
     [holeIndex, metadata, slabId],

packages/editor/src/components/editor/wall-move-side-handles.tsx

@@ -34,6 +34,7 @@ import { mergeGeometries } from 'three/examples/jsm/utils/BufferGeometryUtils.js
 import { MeshBasicNodeMaterial } from 'three/webgpu'
 import { sfxEmitter } from '../../lib/sfx-bus'
 import useEditor from '../../store/use-editor'
+import useInteractionScope from '../../store/use-interaction-scope'
 import { suppressBoxSelectForPointer } from '../tools/select/box-select-state'
 import {
   createArrowHitAreaGeometry,
@@ -468,7 +469,7 @@ function WallHeightArrowHandle({ wall }: { wall: WallNode }) {
 
     document.body.style.cursor = 'ns-resize'
     sfxEmitter.emit('sfx:item-pick')
-    useEditor.getState().setActiveHandleDrag({ nodeId: wallId, label: 'height' })
+    useInteractionScope.getState().begin({ kind: 'handle-drag', nodeId: wallId, handle: 'height' })
     // Suppress R3F node pointer events until pointerup completes so the
     // synthesized click doesn't reroute selection to whatever mesh sits
     // under the cursor at release.
@@ -498,7 +499,7 @@ function WallHeightArrowHandle({ wall }: { wall: WallNode }) {
         document.body.style.cursor = ''
       }
       useScene.temporal.getState().resume()
-      useEditor.getState().setActiveHandleDrag(null)
+      useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
       useViewer.getState().setInputDragging(false)
       dragCleanupRef.current = null
     }

packages/editor/src/components/systems/ceiling/ceiling-selection-affordance-system.tsx

@@ -19,6 +19,7 @@ import {
 } from '../../../lib/ceiling-plan-snap'
 import { sfxEmitter } from '../../../lib/sfx-bus'
 import useEditor from '../../../store/use-editor'
+import useInteractionScope from '../../../store/use-interaction-scope'
 import { snapToHalf } from '../../tools/item/placement-math'
 import { suppressBoxSelectForPointer } from '../../tools/select/box-select-state'
 
@@ -198,7 +199,7 @@ const CeilingSelectionAffordance = ({
     editor.setMovingNode(null)
     editor.setMovingWallEndpoint(null)
     editor.setCurvingWall(null)
-    editor.setEditingHole(null)
+    useInteractionScope.getState().endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
     editor.setMode('select')
     useViewer.getState().setSelection({ selectedIds: [effectiveCeiling.id] })
   }, [effectiveCeiling.id])
@@ -485,7 +486,7 @@ const CornerBracket = ({
     useEditor.getState().setMovingNode(null)
     useEditor.getState().setMovingWallEndpoint(null)
     useEditor.getState().setCurvingWall(null)
-    useEditor.getState().setEditingHole(null)
+    useInteractionScope.getState().endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
     useEditor.getState().setMode('select')
 
     emitter.emit('ceiling:click' as any, {

packages/editor/src/components/tools/site/site-boundary-editor.tsx

@@ -17,6 +17,7 @@ import { EDITOR_LAYER } from '../../../lib/constants'
 import { sfxEmitter } from '../../../lib/sfx-bus'
 import { SITE_BOUNDARY_DRAG_LABEL } from '../../../lib/site-boundary'
 import useEditor, { selectSiteFloorplanContext } from '../../../store/use-editor'
+import useInteractionScope from '../../../store/use-interaction-scope'
 import {
   ARROW_COLOR,
   ARROW_HOVER_COLOR,
@@ -376,14 +377,20 @@ export const SiteBoundaryEditor: React.FC = () => {
 
       if (!siteId) return
 
-      const editor = useEditor.getState()
       if (isDragging) {
-        editor.setActiveHandleDrag({ nodeId: siteId, label: SITE_BOUNDARY_DRAG_LABEL })
+        useInteractionScope
-      } else if (
+          .getState()
-        editor.activeHandleDrag?.nodeId === siteId &&
+          .begin({ kind: 'handle-drag', nodeId: siteId, handle: SITE_BOUNDARY_DRAG_LABEL })
-        editor.activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
+      } else {
+        const scope = useInteractionScope.getState().scope
+        const activeHandleDrag =
+          scope.kind === 'handle-drag' ? { nodeId: scope.nodeId, label: scope.handle } : null
+        if (
+          activeHandleDrag?.nodeId === siteId &&
+          activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
         ) {
-        editor.setActiveHandleDrag(null)
+          useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
+        }
       }
 
       if (!isDragging) {
@@ -396,12 +403,14 @@ export const SiteBoundaryEditor: React.FC = () => {
   useEffect(
     () => () => {
       if (!siteId) return
-      const editor = useEditor.getState()
+      const scope = useInteractionScope.getState().scope
+      const activeHandleDrag =
+        scope.kind === 'handle-drag' ? { nodeId: scope.nodeId, label: scope.handle } : null
       if (
-        editor.activeHandleDrag?.nodeId === siteId &&
+        activeHandleDrag?.nodeId === siteId &&
-        editor.activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
+        activeHandleDrag.label === SITE_BOUNDARY_DRAG_LABEL
       ) {
-        editor.setActiveHandleDrag(null)
+        useInteractionScope.getState().endIf((sc) => sc.kind === 'handle-drag')
       }
       useLiveNodeOverrides.getState().clearFields(siteId, ['polygon'])
       isDraggingSiteBoundaryRef.current = false

packages/editor/src/components/tools/tool-manager.tsx

@@ -9,6 +9,7 @@ import {
 import { useViewer } from '@pascal-app/viewer'
 import { type ComponentType, lazy, Suspense } from 'react'
 import useEditor, { type Phase, type Tool } from '../../store/use-editor'
+import { useEditingHole } from '../../store/use-interaction-scope'
 import { Alignment3DGuideLayer } from '../editor/alignment-3d-guide-layer'
 import { OpeningGuides3DLayer } from '../editor/opening-guides-3d-layer'
 import { WallSnapBeaconLayer } from '../editor/wall-snap-beacon-layer'
@@ -61,7 +62,7 @@ export const ToolManager: React.FC = () => {
   const movingFenceEndpoint = useEditor((state) => state.movingFenceEndpoint)
   const curvingWall = useEditor((state) => state.curvingWall)
   const curvingFence = useEditor((state) => state.curvingFence)
-  const editingHole = useEditor((state) => state.editingHole)
+  const editingHole = useEditingHole()
   const selectedZoneId = useViewer((state) => state.selection.zoneId)
   const selectedIds = useViewer((state) => state.selection.selectedIds)
   const buildingId = useViewer((state) => state.selection.buildingId)

packages/editor/src/components/ui/helpers/helper-manager.tsx

@@ -17,6 +17,7 @@ import {
 } from '../../../lib/contextual-help'
 import { canDirectMoveNode, canDirectRotateNode } from '../../../lib/direct-manipulation'
 import useEditor from '../../../store/use-editor'
+import { useActiveHandleDrag } from '../../../store/use-interaction-scope'
 import { BuildingHelper } from './building-helper'
 import { ContextualHelperPanel } from './contextual-helper-panel'
 import { ItemHelper } from './item-helper'
@@ -66,7 +67,7 @@ export function HelperManager() {
   const mode = useEditor((s) => s.mode)
   const tool = useEditor((s) => s.tool)
   const movingNode = useEditor((state) => state.movingNode)
-  const activeHandleDrag = useEditor((state) => state.activeHandleDrag)
+  const activeHandleDrag = useActiveHandleDrag()
   const selectedIds = useViewer((s) => s.selection.selectedIds)
   const isMobile = useIsMobile()
   const modifiers = useActiveModifierKeys()

packages/editor/src/hooks/use-keyboard.ts

@@ -10,6 +10,7 @@ import {
 import { emitDeleteSFX, sfxEmitter } from '../lib/sfx-bus'
 import { toggleWindowOpenState } from '../lib/window-interaction'
 import useEditor from '../store/use-editor'
+import useInteractionScope from '../store/use-interaction-scope'
 
 // Tools call this in their onCancel handler when they have an active mid-action to cancel,
 // so that the global Escape handler knows not to also switch to select mode.
@@ -101,7 +102,9 @@ export const useKeyboard = ({
           const currentPhase = useEditor.getState().phase
           const currentStructureLayer = useEditor.getState().structureLayer
 
-          useEditor.getState().setEditingHole(null)
+          useInteractionScope
+            .getState()
+            .endIf((sc) => sc.kind === 'reshaping' && sc.reshape === 'hole')
 
           // From zone mode, return to structure select
           if (currentPhase === 'structure' && currentStructureLayer === 'zones') {

packages/editor/src/index.tsx

@@ -245,6 +245,7 @@ export {
   getFloorplanWallThickness,
 } from './lib/floorplan'
 export { commitFreshPlacementSubtree } from './lib/fresh-planar-placement'
+export { holeEditScope } from './lib/interaction/scope'
 export {
   buildResetSurfaceMaterialUpdates,
   buildRoofSurfaceMaterialPatch,
@@ -328,6 +329,12 @@ export type {
   WorkspaceMode,
 } from './store/use-editor'
 export { default as useEditor, isAngleSnapActive, isMagneticSnapActive } from './store/use-editor'
+export {
+  default as useInteractionScope,
+  getEditingHole,
+  useActiveHandleDrag,
+  useEditingHole,
+} from './store/use-interaction-scope'
 export {
   default as useOpeningGuides,
   type OpeningGuide3D,

packages/editor/src/lib/interaction/scope.ts

@@ -77,3 +77,37 @@ export function scopeNodeId(scope: InteractionScope): string | null {
 export function selectionEnabled(scope: InteractionScope): boolean {
   return scope.kind === 'idle'
 }
+
+// Derived views of the scope that mirror the legacy `useEditor` flags they
+// replaced. Each returns null unless that exact interaction is active, so a
+// stale payload is unrepresentable: the value is a pure function of the single
+// authoritative scope, not an independent flag that can drift out of sync.
+
+// The legacy `activeHandleDrag` flag. `label` keeps the legacy field name so
+// downstream `=== ROTATE_HANDLE_DRAG_LABEL` / `=== 'height'` checks are unchanged.
+export function handleDragInfo(scope: InteractionScope): { nodeId: string; label: string } | null {
+  return scope.kind === 'handle-drag' ? { nodeId: scope.nodeId, label: scope.handle } : null
+}
+
+// The legacy `editingHole` flag (`SurfaceHoleTarget`).
+export function editingHoleInfo(
+  scope: InteractionScope,
+): { nodeId: string; holeIndex: number } | null {
+  return scope.kind === 'reshaping' && scope.reshape === 'hole' && scope.holeIndex !== undefined
+    ? { nodeId: scope.nodeId, holeIndex: scope.holeIndex }
+    : null
+}
+
+// Build the scope payload for a hole reshape, so producers don't re-spell the
+// discriminator at every call site.
+export function holeEditScope(target: {
+  nodeId: string
+  holeIndex: number
+}): ActiveInteractionScope {
+  return {
+    kind: 'reshaping',
+    nodeId: target.nodeId,
+    reshape: 'hole',
+    holeIndex: target.holeIndex,
+  }
+}

packages/editor/src/lib/scene.ts

@@ -362,7 +362,6 @@ function resetEditorInteractionState() {
     movingNode: null,
     selectedReferenceId: null,
     spaces: {},
-    editingHole: null,
     hoveredHole: null,
     isPreviewMode: false,
   })

packages/editor/src/store/use-editor.tsx

@@ -297,18 +297,6 @@ type EditorState = {
   setMovingWallEndpoint: (value: MovingWallEndpoint | null) => void
   movingFenceEndpoint: MovingFenceEndpoint | null
   setMovingFenceEndpoint: (value: MovingFenceEndpoint | null) => void
-  /**
-   * Generic per-kind handle drag state. Set by a node's resize handle
-   * (height arrow, width arrow, rise / sweep / inner-radius for curved
-   * stairs, …) at drag-start and cleared on drag-end. `label`
-   * identifies which dimension the handle controls — measurement
-   * overlays read it to render the right caption; the camera controls
-   * use the truthy value to suppress one-finger pan-rotate. Replaces
-   * the previous per-kind `resizing*` fields so adding a new resize
-   * handle doesn't require a new store field.
-   */
-  activeHandleDrag: { nodeId: AnyNodeId; label: string } | null
-  setActiveHandleDrag: (drag: { nodeId: AnyNodeId; label: string } | null) => void
   /**
    * World axis the R/T keyboard rotation turns around, for kinds with
    * full 3D orientation (duct fittings). Alt cycles it Y → X → Z; the
@@ -343,9 +331,6 @@ type EditorState = {
   // Space detection for cutaway mode
   spaces: Record<string, Space>
   setSpaces: (spaces: Record<string, Space>) => void
-  // Generic hole editing (works for slabs, ceilings, and any future polygon nodes)
-  editingHole: SurfaceHoleTarget | null
-  setEditingHole: (hole: SurfaceHoleTarget | null) => void
   hoveredHole: SurfaceHoleTarget | null
   setHoveredHole: (hole: SurfaceHoleTarget | null) => void
   // Preview mode (viewer-like experience inside the editor)
@@ -895,13 +880,6 @@ const useEditor = create<EditorState>()(
         }
         set({ movingFenceEndpoint: value })
       },
-      activeHandleDrag: null,
-      setActiveHandleDrag: (drag) => {
-        const scope = useInteractionScope.getState()
-        if (drag) scope.begin({ kind: 'handle-drag', nodeId: drag.nodeId, handle: drag.label })
-        else scope.endIf((s) => s.kind === 'handle-drag')
-        set({ activeHandleDrag: drag })
-      },
       rotationAxis: 'y',
       cycleRotationAxis: () => {
         const order = ['y', 'x', 'z'] as const
@@ -1015,25 +993,6 @@ const useEditor = create<EditorState>()(
         }),
       spaces: {},
       setSpaces: (spaces) => set({ spaces }),
-      editingHole: null,
-      setEditingHole: (hole) => {
-        const scope = useInteractionScope.getState()
-        if (hole)
-          scope.begin({
-            kind: 'reshaping',
-            nodeId: hole.nodeId,
-            reshape: 'hole',
-            holeIndex: hole.holeIndex,
-          })
-        else {
-          const prev = get().editingHole
-          if (prev)
-            scope.endIf(
-              (s) => s.kind === 'reshaping' && s.reshape === 'hole' && s.nodeId === prev.nodeId,
-            )
-        }
-        set({ editingHole: hole })
-      },
       hoveredHole: null,
       setHoveredHole: (hole) =>
         set((state) =>

packages/editor/src/store/use-interaction-scope.test.ts

@@ -1,5 +1,13 @@
 import { afterEach, describe, expect, test } from 'bun:test'
-import { isActive, isIdle, scopeNodeId, selectionEnabled } from '../lib/interaction/scope'
+import {
+  type ActiveInteractionScope,
+  editingHoleInfo,
+  handleDragInfo,
+  isActive,
+  isIdle,
+  scopeNodeId,
+  selectionEnabled,
+} from '../lib/interaction/scope'
 import useInteractionScope from './use-interaction-scope'
 
 function reset() {
@@ -77,3 +85,59 @@ describe('use-interaction-scope state machine', () => {
     expect(useInteractionScope.getState().scope.kind).toBe('idle')
   })
 })
+
+describe('derived flag views are leak-free (no parallel flags)', () => {
+  const scope = () => useInteractionScope.getState().scope
+
+  test('handleDragInfo mirrors handle-drag and clears on end', () => {
+    const s = useInteractionScope.getState()
+    s.begin({ kind: 'handle-drag', nodeId: 'wall_1', handle: 'height' })
+    expect(handleDragInfo(scope())).toEqual({ nodeId: 'wall_1', label: 'height' })
+    s.end()
+    // After end the derived view is null — a stale activeHandleDrag is
+    // unrepresentable because it is a pure function of the single scope.
+    expect(handleDragInfo(scope())).toBeNull()
+  })
+
+  test('editingHoleInfo mirrors a hole reshape and clears on end', () => {
+    const s = useInteractionScope.getState()
+    s.begin({ kind: 'reshaping', nodeId: 'slab_1', reshape: 'hole', holeIndex: 2 })
+    expect(editingHoleInfo(scope())).toEqual({ nodeId: 'slab_1', holeIndex: 2 })
+    s.end()
+    expect(editingHoleInfo(scope())).toBeNull()
+  })
+
+  test('a non-hole reshape never reads as an editing hole', () => {
+    const s = useInteractionScope.getState()
+    s.begin({ kind: 'reshaping', nodeId: 'wall_1', reshape: 'curve' })
+    expect(editingHoleInfo(scope())).toBeNull()
+  })
+
+  test('switching interactions never leaks the prior derived view', () => {
+    const s = useInteractionScope.getState()
+    s.begin({ kind: 'handle-drag', nodeId: 'wall_1', handle: 'height' })
+    // Single-owner replacement: the handle-drag view must vanish the instant a
+    // different interaction begins — the two cannot be simultaneously active.
+    s.begin({ kind: 'reshaping', nodeId: 'slab_1', reshape: 'hole', holeIndex: 0 })
+    expect(handleDragInfo(scope())).toBeNull()
+    expect(editingHoleInfo(scope())).toEqual({ nodeId: 'slab_1', holeIndex: 0 })
+  })
+
+  test('every active scope kind leaves at most the views it owns', () => {
+    const s = useInteractionScope.getState()
+    const kinds: ActiveInteractionScope[] = [
+      { kind: 'placing', nodeId: 'i', nodeType: 'item', view: '3d', pressDrag: false },
+      { kind: 'moving', nodeId: 'i', nodeType: 'item', view: '3d' },
+      { kind: 'drafting', tool: 'wall' },
+      { kind: 'box-select' },
+      { kind: 'painting' },
+    ]
+    for (const k of kinds) {
+      s.begin(k)
+      // None of these own a handle-drag or hole view.
+      expect(handleDragInfo(scope())).toBeNull()
+      expect(editingHoleInfo(scope())).toBeNull()
+    }
+    s.end()
+  })
+})

packages/editor/src/store/use-interaction-scope.ts

@@ -1,8 +1,11 @@
 'use client'
 
 import { create } from 'zustand'
+import { useShallow } from 'zustand/react/shallow'
 import {
   type ActiveInteractionScope,
+  editingHoleInfo,
+  handleDragInfo,
   IDLE_SCOPE,
   type InteractionScope,
 } from '../lib/interaction/scope'
@@ -52,4 +55,18 @@ const useInteractionScope = create<InteractionScopeState>((set, get) => ({
   },
 }))
 
+// Derived, reference-stable views of the active scope, replacing the legacy
+// `useEditor.activeHandleDrag` / `useEditor.editingHole` flags. `useShallow`
+// keeps the result reference-stable across unrelated scope changes, so hot-path
+// subscribers (camera controls, floating menu) don't re-render on every update.
+export const useActiveHandleDrag = (): { nodeId: string; label: string } | null =>
+  useInteractionScope(useShallow((s) => handleDragInfo(s.scope)))
+
+export const useEditingHole = (): { nodeId: string; holeIndex: number } | null =>
+  useInteractionScope(useShallow((s) => editingHoleInfo(s.scope)))
+
+// Imperative (non-React) reads for event handlers / effects.
+export const getEditingHole = (): { nodeId: string; holeIndex: number } | null =>
+  editingHoleInfo(useInteractionScope.getState().scope)
+
 export default useInteractionScope

packages/nodes/src/ceiling/panel.tsx

@@ -4,11 +4,14 @@ import { type AnyNode, type CeilingNode, useScene } from '@pascal-app/core'
 import {
   ActionButton,
   ActionGroup,
+  holeEditScope,
   PanelSection,
   PanelWrapper,
   SliderControl,
   triggerSFX,
+  useEditingHole,
   useEditor,
+  useInteractionScope,
 } from '@pascal-app/editor'
 import { useViewer } from '@pascal-app/viewer'
 import { Edit, Move, Plus, Trash2 } from 'lucide-react'
@@ -25,8 +28,7 @@ import { useCallback, useEffect, useRef } from 'react'
 export function CeilingPanel() {
   const selectedId = useViewer((s) => s.selection.selectedIds[0])
   const setSelection = useViewer((s) => s.setSelection)
-  const editingHole = useEditor((s) => s.editingHole)
+  const editingHole = useEditingHole()
-  const setEditingHole = useEditor((s) => s.setEditingHole)
   const setMovingNode = useEditor((s) => s.setMovingNode)
 
   const node = useScene((s) =>
@@ -48,20 +50,26 @@ export function CeilingPanel() {
 
   const handleClose = useCallback(() => {
     setSelection({ selectedIds: [] })
-    setEditingHole(null)
+    useInteractionScope
-  }, [setSelection, setEditingHole])
+      .getState()
+      .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
+  }, [setSelection])
 
   useEffect(() => {
     if (!node) {
-      setEditingHole(null)
+      useInteractionScope
+        .getState()
+        .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
     }
-  }, [node, setEditingHole])
+  }, [node])
 
   useEffect(() => {
     return () => {
-      setEditingHole(null)
+      useInteractionScope
+        .getState()
+        .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
     }
-  }, [setEditingHole])
+  }, [])
 
   const handleAddHole = useCallback(() => {
     if (!(node && selectedId)) return
@@ -91,15 +99,17 @@ export function CeilingPanel() {
       holes: [...currentHoles, newHole],
       holeMetadata: [...currentMetadata, { source: 'manual' }],
     })
-    setEditingHole({ nodeId: selectedId, holeIndex: currentHoles.length })
+    useInteractionScope
-  }, [node, selectedId, handleUpdate, setEditingHole])
+      .getState()
+      .begin(holeEditScope({ nodeId: selectedId, holeIndex: currentHoles.length }))
+  }, [node, selectedId, handleUpdate])
 
   const handleEditHole = useCallback(
     (index: number) => {
       if (!selectedId) return
-      setEditingHole({ nodeId: selectedId, holeIndex: index })
+      useInteractionScope.getState().begin(holeEditScope({ nodeId: selectedId, holeIndex: index }))
     },
-    [selectedId, setEditingHole],
+    [selectedId],
   )
 
   const handleDeleteHole = useCallback(
@@ -114,10 +124,12 @@ export function CeilingPanel() {
       const newMetadata = currentMetadata.filter((_, i) => i !== index)
       handleUpdate({ holes: newHoles, holeMetadata: newMetadata })
       if (editingHole?.nodeId === selectedId && editingHole?.holeIndex === index) {
-        setEditingHole(null)
+        useInteractionScope
+          .getState()
+          .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
       }
     },
-    [selectedId, node?.holes, node?.holeMetadata, handleUpdate, editingHole, setEditingHole],
+    [selectedId, node?.holes, node?.holeMetadata, handleUpdate, editingHole],
   )
 
   const handleMove = useCallback(() => {
@@ -213,7 +225,13 @@ export function CeilingPanel() {
                       <ActionButton
                         className="h-7 bg-primary text-primary-foreground hover:bg-primary/90"
                         label="Done"
-                        onClick={() => setEditingHole(null)}
+                        onClick={() =>
+                          useInteractionScope
+                            .getState()
+                            .endIf(
+                              (scope) => scope.kind === 'reshaping' && scope.reshape === 'hole',
+                            )
+                        }
                       />
                     ) : isAutoHole ? (
                       <div className="rounded-md bg-[#2C2C2E] px-2 py-1 text-[10px] text-muted-foreground">

packages/nodes/src/slab/panel.tsx

@@ -4,11 +4,14 @@ import { type AnyNode, type SlabNode, useScene } from '@pascal-app/core'
 import {
   ActionButton,
   ActionGroup,
+  holeEditScope,
   PanelSection,
   PanelWrapper,
   SliderControl,
   triggerSFX,
+  useEditingHole,
   useEditor,
+  useInteractionScope,
 } from '@pascal-app/editor'
 import { useViewer } from '@pascal-app/viewer'
 import { Edit, Move, Plus, Trash2 } from 'lucide-react'
@@ -28,8 +31,7 @@ import { useCallback, useEffect, useRef } from 'react'
 export function SlabPanel() {
   const selectedId = useViewer((s) => s.selection.selectedIds[0])
   const setSelection = useViewer((s) => s.setSelection)
-  const editingHole = useEditor((s) => s.editingHole)
+  const editingHole = useEditingHole()
-  const setEditingHole = useEditor((s) => s.setEditingHole)
   const setMovingNode = useEditor((s) => s.setMovingNode)
 
   const node = useScene((s) =>
@@ -52,20 +54,26 @@ export function SlabPanel() {
 
   const handleClose = useCallback(() => {
     setSelection({ selectedIds: [] })
-    setEditingHole(null)
+    useInteractionScope
-  }, [setSelection, setEditingHole])
+      .getState()
+      .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
+  }, [setSelection])
 
   useEffect(() => {
     if (!node) {
-      setEditingHole(null)
+      useInteractionScope
+        .getState()
+        .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
     }
-  }, [node, setEditingHole])
+  }, [node])
 
   useEffect(() => {
     return () => {
-      setEditingHole(null)
+      useInteractionScope
+        .getState()
+        .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
     }
-  }, [setEditingHole])
+  }, [])
 
   const handleAddHole = useCallback(() => {
     if (!(node && selectedId)) return
@@ -95,15 +103,17 @@ export function SlabPanel() {
       holes: [...currentHoles, newHole],
       holeMetadata: [...currentMetadata, { source: 'manual' }],
     })
-    setEditingHole({ nodeId: selectedId, holeIndex: currentHoles.length })
+    useInteractionScope
-  }, [node, selectedId, handleUpdate, setEditingHole])
+      .getState()
+      .begin(holeEditScope({ nodeId: selectedId, holeIndex: currentHoles.length }))
+  }, [node, selectedId, handleUpdate])
 
   const handleEditHole = useCallback(
     (index: number) => {
       if (!selectedId) return
-      setEditingHole({ nodeId: selectedId, holeIndex: index })
+      useInteractionScope.getState().begin(holeEditScope({ nodeId: selectedId, holeIndex: index }))
     },
-    [selectedId, setEditingHole],
+    [selectedId],
   )
 
   const handleDeleteHole = useCallback(
@@ -118,10 +128,12 @@ export function SlabPanel() {
       const newMetadata = currentMetadata.filter((_, i) => i !== index)
       handleUpdate({ holes: newHoles, holeMetadata: newMetadata })
       if (editingHole?.nodeId === selectedId && editingHole?.holeIndex === index) {
-        setEditingHole(null)
+        useInteractionScope
+          .getState()
+          .endIf((scope) => scope.kind === 'reshaping' && scope.reshape === 'hole')
       }
     },
-    [selectedId, node?.holes, node?.holeMetadata, handleUpdate, editingHole, setEditingHole],
+    [selectedId, node?.holes, node?.holeMetadata, handleUpdate, editingHole],
   )
 
   const handleMove = useCallback(() => {
@@ -219,7 +231,13 @@ export function SlabPanel() {
                       <ActionButton
                         className="h-7 bg-primary text-primary-foreground hover:bg-primary/90"
                         label="Done"
-                        onClick={() => setEditingHole(null)}
+                        onClick={() =>
+                          useInteractionScope
+                            .getState()
+                            .endIf(
+                              (scope) => scope.kind === 'reshaping' && scope.reshape === 'hole',
+                            )
+                        }
                       />
                     ) : isAutoHole ? (
                       <div className="rounded-md bg-[#2C2C2E] px-2 py-1 text-[10px] text-muted-foreground">